Derivative Financial Instruments - Summary of Notional Balance and Fair Values of Derivatives Outstanding (Detail) - USD ($)	Dec. 31, 2021	Dec. 31, 2020
Derivatives, Fair Value [Line Items]
Notional Amount	$ 184,943,000	$ 124,926,000
Derivative Assets	5,021,000	7,172,000
Derivative Liabilities	5,553,000	8,317,000
Cash collateral, Derivative Liabilities	(8,441,000)	(8,440,000)
Netting adjustments, Derivative Assets	2,994,000	123,000
Netting adjustments, Derivative Liabilities	2,994,000	123,000
Net amount presented in Balance Sheet, Derivative Assets	8,015,000	7,295,000
Net amount presented in Balance Sheet, Derivative Liabilities	106,000
Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Notional Amount	34,163,000	5,585,000
Derivative Assets	602,000
Derivative Liabilities	369,000	497,000
Designated as Hedging Instrument [Member] | Interest Rate Swaps [Member]
Derivatives, Fair Value [Line Items]
Notional Amount	26,663,000	5,585,000
Derivative Liabilities	369,000	497,000
Designated as Hedging Instrument [Member] | Cash Flow Hedging [Member] | Interest Rate Swaps [Member]
Derivatives, Fair Value [Line Items]
Notional Amount	7,500,000
Derivative Assets	602,000
Not Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Notional Amount	150,780,000	119,341,000
Derivative Assets	4,419,000	7,172,000
Derivative Liabilities	5,184,000	7,820,000
Not Designated as Hedging Instrument [Member] | Interest Rate Swaps [Member]
Derivatives, Fair Value [Line Items]
Notional Amount	150,780,000	119,341,000
Derivative Assets	4,419,000	7,172,000
Derivative Liabilities	$ 5,184,000	$ 7,820,000